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https://issues.apache.org/jira/browse/NUTCH-669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12653487#action_12653487
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Doğacan Güney commented on NUTCH-669:
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> * What reason is there for Fetcher existing at all since Fetcher2 seems
> to be a superset of functionality?
Agreed. We should just rename Fetcher2 to Fetcher and be done with it :D
> Consolidate code for Fetcher and Fetcher2
> -----------------------------------------
>
> Key: NUTCH-669
> URL: https://issues.apache.org/jira/browse/NUTCH-669
> Project: Nutch
> Issue Type: Improvement
> Components: fetcher
> Affects Versions: 0.9.0
> Reporter: Todd Lipcon
> Priority: Minor
>
> I'd like to consolidate a lot of the common code between Fetcher and
> Fetcher2.java.
> It seems to me like there are the following differences:
> - Fetcher relies on the Protocol to obey robots.txt and crawl delay
> settings whereas Fetcher2 implements them itself
> - Fetcher2 uses a different queueing model (queue per crawl host) to
> accomplish the per-host limiting without making the Protocol do it.
> I've begun work on this but want to check with people on the following:
> - What reason is there for Fetcher existing at all since Fetcher2 seems to be
> a superset of functionality?
> - Is it on the road map to remove the robots/delay logic from the Http
> protocol and make Fetcher2's delegation of duties the standard?
> - Any other improvements wanted for Fetcher while I am in and around the code?
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